The FotodioX WonderPana FreeArc Core Unit Kit for Canon TS-E 17mm Lensis a two-piece assembly designed to be used in combination with a FotodioX WonderPana FreeArc Core Unit, a WonderPana 145 Core Unit, or a WonderPana FreeArc Aluminum Step-Up Ring. A WonderPana Core Unit or a WonderPana FreeArc Aluminum Step-Up Ring with the WonderPana 6.6" Holder Bracket attached can then allow for the convenient use of two 2.5 to 4.0mm-thick filters measuring 6.6" wide, or one 2.5 to 4.0mm-thick filter measuring 6.6" wide along with one FotodioX 145mm round filter behind it.

Use of this holder bracket is easily accomplished by separately attaching its two assembly pieces to opposite sides of a WonderPana Core Unit or a WonderPana FreeArc Aluminum Step-Up Ring using the six included brass short-screws. Pre-tapped threaded inserts along the edge of a WonderPana Core Unit or FreeArc Aluminum Step-Up Ring accommodate those screws and ensure correct positioning of the two assembly pieces so that they are positioned parallel to each other and can hold a 6.6"-wide filter between them. The combined WonderPana Core Unit, or WonderPana FreeArc Aluminum Step-Up Ring, and WonderPana 6.6" Holder Bracket can then be attached to a compatible lens.

For WonderPana Core Units that consist of a rear lens collar and a front filter holder, pre-tapped threaded inserts along the edge of the front filter holder accommodate the six brass short-screws for correct positioning of the WonderPana 6.6" Holder Bracket's two assembly pieces. Once the holder bracket and a front filter holder are combined, and the separate collar has been slid over the rear of a compatible lens until it has achieved a secure fit, the front filter holder with the attached holder bracket can be screwed onto the front of the installed rear lens collar.

After being fitted onto a compatible lens, the bearing design of the WonderPana FreeArc Core Units and WonderPana FreeArc Aluminum Step-Up Rings allows a WonderPana 6.6" Holder Bracket to be rotated 360°. This permits the use of graduated neutral density and other filters that are enhanced by varied positioning. While a WonderPana 145 Core Unit does not include a 360° rotating mechanism, eight pre-tapped threaded inserts all around its edge allows the WonderPana 6.6" Holder Bracket to be installed in 45° increments so that rectangular filters placed within it can be angled to the best approximate position relative to the subject in front of the camera.

The FotodioX WonderPana 6.6" Holder Bracket provides two pairs of filter slots, a configuration that accommodates two compatible rectangular filters. For each rectangular filter that is placed within one of the holder bracket's slots, its position can be secured using the included brass long-screws. Pre-tapped threaded inserts along the outside of the holder bracket allow the long-screws to each apply pressure to a spring-loaded retainer within each filter slot. When a pair of the long-screws are used, the level of grip upon a rectangular filter can be varied, which can complement the use of graduated filters whose effect can be adjusted to better suit changing lighting conditions or creative demands by sliding them up or down within a filter slot.

Each FotodioX WonderPana Core Unit or WonderPana FreeArc Aluminum Step-Up Ring includes front filter threads, which allow a FotodioX 145mm round filter to be used along with this filter holder. If a 145mm round filter is used on the attached WonderPana Core Unit or WonderPana FreeArc Aluminum Step-Up Ring, the rectangular filter slot closest to the rear of the holder bracket becomes unavailable. The WonderPana 6.6" Holder Bracket features a lightweight, aluminum-alloy construction that has a corrosion-resistant, black anodized finish for durability. A rigid pouch is included for storage and transport.

For Canon TS-E 17mm f/4L    WonderPana FreeArc Core Unit, Lens Cap    WonderPana 6.6" Holder Bracket    6.6 x 8.5" Graduated ND 0.6 Filter    Hard-Edged Line of Transition    Up to 4x Filter Factor, 2-Stop    Reduce Exposure in Selective Areas    145mm Circular Polarizer Filter    1.25 to 8x Filter Factor, +0.3 to 3-Stop    Helps to Eliminate Reflections and Glare

• When used with a FotodioX WonderPana FreeArc Core Unit, a WonderPana 145 Core Unit, or a WonderPana FreeArc Aluminum Step-Up Ring, allows for the convenient use of two filters measuring 6.6" wide, or one filter measuring 6.6" wide along with one FotodioX 145mm round filter installed on a Core Unit or FreeArc Aluminum Step-Up Ring
• Provides two pairs of filter slots, a configuration that accommodates up to two 2.5 to 4.0mm-thick rectangular filters
• Allows up to two compatible rectangular filters to be rotated 360° when used with a FotodioX WonderPana FreeArc Core Unit or WonderPana FreeArc Aluminum Step-Up Ring
• When used with a WonderPana 145 Core Unit, allows up to two compatible rectangular filters to be installed in 45° increments so that a filter placed within it can be angled to the best approximate position relative to the subject in front of the camera
• Ability to vary grip on each installed rectangular filter to complement the use of graduated filters whose effect can be adjusted to better suit changing lighting conditions or creative demands by sliding them up or down within a filter slot
• Lightweight, aluminum-alloy construction with a corrosion-resistant, black anodized finish for durability
• Rigid pouch included for storage and transport

Related Questions and Answers

Q: 1. Lens hood included or is this lens to be used with the glass exposed like that?

A: The lens has no hood or filter ring. You must use it with Lee or other filter holders. The lens is strictly manual focus, manual exposure and is best used with a 1 deg. spot meter. You can rotate the tilt and the shift so both can be used in different orientations. Somewhat like the front of a view camera.

Q: 2. Does this lens somehow let the user know if the photo is in focus? Is there something that blinks? I am shooting with a 5D Mark IV. Thanks!

A: Hi Austin. This is a manual focusing lens. The blink will occur with auto focusing lenses. This lens is intended to be used with a tripod and stopped down a bit (f/8.0) should work. Use the manual focus ring to set the distance. With the aperture stopped down on a 17mm lens just about everything in the frame should be in focus.

Q: 3. Is this lens compatible with either the Canon Rebel XSi and/or Canon EOS 5D Mark III cameras? Thanks!

A: Yes, this lens is fully compatible with the Canon XSi and 5D Mk III cameras, and any other Canon EOS Digital or Film SLR cameras.

Q: 4. For Portrait vs Landscape photos, do I need to use the Rotation function to 90 degrees (+- depending on left/right camera rotation)?

A: No, one does not adjust the mount rotation: +/- 90° on the Canon TS-E 17mm f/4L Tilt-Shift Lens based on shooting orientation. Rotation of the tilt-shift mechanism should be done based on what is needed for the specific composition. This is independent of camera orientation.

Q: 5. Is there anyone out there who has used it on the new Sony Ar7II with the metabones adapter? What is your experience? Sharpness, auto anything work?

A: You could use this with the A7R II using an adapter like those from Metabones.

Q: 6. is there a way to use a 82mm circular polarizer for my 17mm ts with this ring?

A: No, there is not. The Vu Filters 150mm Professional Filter Holder Lens Ring for Canon TS-E 17mm f/4L Lens is designed for use with the Vu Filters 150mm Professional Filter Holder, which is designed for use with 150mm-wide square or rectangular filters. There is no adapter ring to connect the smaller 82mm circular filter onto/into the Vu Filters 150mm Professional Filter Holder.

Q: 7. Anyone have experience using this lens on an APS-C camera? Specifically, I have a 7Dmk2 that I would be using it on.

A: Yes, on a Canon Rebel. It's a longer lens than 24 mm (for a full frame sensor) but works fine.

Q: 8. Will this work on Canon R-mount cameras with the EF adapter?

A: Absolutely! The TS-E 17mm f/4L will work wonderfully with the EF-RF adapter.

Q: 9. Does this lens come with an instruction manual or just a one page generic instruction sheet that covers all Canon lenses? ( my came with the one page generic sheet)

A: The lens does not come with an instruction manual. Most manufacturers are only putting manuals onto their website to download instead of printing and shipping them with products.

Q: 10. One of the reviewers mentioned the Fotodiox Wonderpana Freearc system to protect the front lens of the TS-E 17mm. I like that idea, but which one?

A: I have used the TS-E 17 for a couple of years. Absolutely love this lens. I however don't want to put anything between my great UD L series glass and the subject. I will admit that I was concerned about the protruding front element at first. However the concerns have faded with use. I usually have the lens cap in place unless I'm taking a shot, but have trekked about in major cities like Chicago and D.C. with the lens ready to go. I do recommend that you cary a good cleaning kit in your bag, and as with all optics keep 'em clean. This lens is absolutely awesome - go shoot and get comfortable with working with such an outstanding piece of glass!